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CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2019 | Mar. 31, 2018
Income Statement [Abstract] |  |
Net revenues | $ 1,891 | $ 1,884
Operating costs and expenses and other operating income: |  |
Cost of services | 1,244 | 1,226
Selling, general and administrative | 384 | 363
Amortization of intangible assets | 24 | 22
Other operating (income) expense, net | (9) | 1
Total operating costs and expenses, net | 1,643 | 1,612
Operating income | 248 | 272
Other income (expense): |  |
Interest expense, net | (44) | (41)
Other income (expense), net | 9 | (2)
Total non-operating expenses, net | (35) | (43)
Income before income taxes and equity in earnings of equity method investees | 213 | 229
Income tax expense | (50) | (52)
Equity in earnings of equity method investees, net of taxes | 13 | 12
Net income | 176 | 189
Less: Net income attributable to noncontrolling interests | 12 | 12
Net income attributable to Quest Diagnostics | $ 164 | $ 177
Earnings per share attributable to Quest Diagnostics’ common stockholders: |  |
Basic (per share) | $ 1.22 | $ 1.30
Diluted (per share) | $ 1.20 | $ 1.27
Weighted average common shares outstanding: |  |
Basic (in Shares) | 134 | 136
Diluted (in Shares) | 136 | 139

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